Grinding apparatus



'E. E. THOMAS GRINDING APPARATUS Filed April 19 192.4 3 sheets-sheet 1'IN VEN TOR.

77am s A TTORNEY.

E. E. THOMAS GRINDING APPARATUS Filed April 19. 1924 3 Sheets-Sheet 2INVENToR.

Il? mamas ,0a. 6,1925- v l E. "E. THOMAS GRINDING APPARATUS FiledvApu-:L1 19. 1924 3 Sheets-Sheet :5

INVENTOR.

ATTORNEY.

i 1 citizen of the United-States,y residing at` Patented Oct. 6, 1,925.

ELMER E. THoivIae, oFrHAR'DIN, ILLINOIS.

PATENT oei-ica sminuire APrAnArUs.: .1.

Alipiication ied April i9, 1924. Seriai no; #073677.' Y

e To all 'wh-omit may concern."

Be it kno-wn that I, ELMER E. THOMAS, a

Hardin, in the county of Calhoun and State of Illinois, have inventedcertain new and useful Improvements iny Grinding Apparatus,'of which thefollowing is a specification,

`r`eferencefbeing had to the accompanying drawings. v s

This invention relates to certain improvements Vin grinding apparatusand has relation more particularly to a devicev of this generalcharacter especially Vdesigned and adapted forv use in? connection `withthe grinding out of cylinders and kindred iiiternal work and it is anobject of the inventionto provide afdevice ofthis kind having novel andimproved means' whereby the grinding or workingeleirient canbepositioiied or adjusted with respect tothe work asl the requirementsof practice may necessitate. l l i Furthermore it is an object of theinvention to provide a device of' this general character comprising alrdrum adapted to be snugly engaged wit-hin 'the boreof a casting orltlielike to be ground. said drum having f arranged therein a grindingelement adapt-- ed to be suitablyprojeeted through an opening formed ina wall of Athevdrum to engagev the surface vto be operated upon togetherwith means operable exteriorly of thefdrum foi' adjusting said grinding`element as required.'V l t The invention consists inthe details ofconstruction and in the combinationand ar-, rangement of the severalparts of my iinproved grinding apparatusrwhereby certain importantadvantages are attained and the device rendered simpler, less expensiveandy otherwise more convenient and advantageous for use, as will behereinafter more fully hereinafter be definitelyfvelaimed. E

In order that my invention may be'v'the better understood, Iwill nowproceed to describe the same with reference to the ac companyingdrawings, wherein :-'4 y e Figure l is a view in'elevationvillustratinga 'grinding apparatus constructed in accordancewithan embodiment of myinvention;

vFigure 2 is an enlarged fragmentary view in elevation of-'the meansasherein disclosed for adjusting the grinding element toward or from itswork and for rnovingsaid element .along they work; e,

Y Figure Bisga `fragmentary,view partly in section and partly inelevation illustrating details of constructionl as comprised in Figure2; Y i

Figure 4 is an enlarged fragmentary vertical sectional view with partsin top plan of the drum and the parts immediately associatedtlierewith;f Y

Figure 5 vis a viewV partly in section and partly in plan of thestructure shown in Figure 4, the line offsection being 'substantially atright angles to that of the line of section in Figure 4;

ing in the direction of the arrow;`

Figure 7 is an enlarged fragmentary view partly in section and partly`in elevation for the apparatus as herein set forth;`

Figure 8 isa view in end elevation of the structure `as illustratedl inFigure'? Figure 9 is a jsectional View taken substantially on the line 99 of Figure 7 Figure 10 is a sectional view taken substantially on'theline l0-10 vof Figure As disclosed in the accompanying drawings, 1denotesa supporting member or base of desired configuration and 4whichis provided at predetermined points spaced longitudinally thereof withthe upstanding posts 2 and 3 provided at, their tops with the bear ingsl,4 and 5 respectively..

Rotatablysupported by the bea-ring Liis an d elongated tubular member6,'said member 6 being free to rotate and also' freev to have lengthwise`movement ,through the vbearingr Villustratingin detail the A"drivingmediums 4. f The inner end portion of the member 6 ,l

is reeeivedwithin a split collar 7 carried-by j the `head 8 of the drumD, said collar'7 being adapted to be clamped to the member 6, in awell-known manner by a coacting nut and bolt as indicated at9.` By thismeansl theinnerend portion of the. member 6 and the head 8 areeffectively locked one vto the.

other vfor unitary movement. VVClai'nped to the outer end A portionofi-the; member''is a split sleeve 1-1 "constituting a ies hub for theend wheel 12, the purpose of which being hereinafter more particularlyreferred to.

Rotatably supported by the bearing 5 is an elongated tubular member 14also being freely movable longitudinally through said bearing and theinner end portion of the member 14 is clamped within the split collar 15carried by the second head 16 of the drum D, said collar 15 being heldin a conventional way in clamping engagement with the member 14 throughthe coacting bolt and nut 17 whereby the headL 16 and the member 14 areunited for unitary movement.

Each of the heads 8 and 16 partially telescope within the cylindricalwall 18 of the drum `and is held in applied position through the mediumof the threaded members 19, the outer end portions of which being flushwith the peripheral face of the wall 18. The drum D is of a diameter tosubstantially snugly engage within the bore of the casing` to be workedand the wall 18 at substantially its longitudinal center is providedwith an elongated opening 20 tin-ough which is adapted to be projectedas desired the grinding element or disc 21. The disc 21 partiallyextends within the kerf 22 provided in the outer end portion of an arm23. said disc being fixed to a shaft 24 rotatably supported by said arm23. The opposite end portion of the arm 23 extends between twolongitudinally spaced internal fianges 25 carried by the wall 18 and issupported for pivotal movement by the pin 26 held by said Hanges 25 anddisposed. through the arm 23. Disposed between the flanges 25 and thearm23 are the retractile springs 27 which serve to move the arm 23 in adirection to urge the grinding element or discI 21 inwardly through theopening 2() away from the work yet permitting said element or disc 21 tohave outward movement as the necessities of practice may necessitate.

The opposite end portions of the member 14 have fixed therein. thebushings 27 which provide mountings for the tubular shaft 28er-rgtending through the member 14. the inner end portion of which beingreceived within the opening 29 provided in the axial center of the head16. The bore 30 of the shaft 28 is angular in cross section and fittedwithin the inner end portion of the bore 30 of said shaft 28 is a block31 operatively connected with an end portion of the shaft 24 through themedium of the universal connection 32 whereby upon rotation of the shaft28 desired rotary movement is imparted to the grinding element or disc21.

Extending upwardly froln the base member 1 outwardly of the post 3 is apedestal 33 provided at its upper end portion with the spaced bearings34 providing a mounting for the sleeve 35 the bore 36 of which beingangular in cross section. Mounted upon the sleeve 35 intermediate thebearings 34 is a pulley 3.7, said pulley being keyed, as at 38, orotherwise held to the sleeve 35 for unitary rotation therewith. Thepulley 37 is adapted to be driven by a belt leading from a suitablesource of power. Snugly fitting within the bore 36 of the sleeve 35 isan end portion of a shaft 39, the same being held against endwisemovement with respect to the sleeve 35 by the binding screw 4() or thelike. rThe shaft 3f) is of desired length and is telescopically engagedwithin the bore 30 of the shaft 28 hereinbefore referred to whereby saidshaft 28 is driven from the shaft 39 vet permitting the shaft 28 to bemoved lengthwise relative to the shaft 39.

Engaged within the opposite end portions of the member 6 are thebushings 41 providing bearings for the shaft 42 extending through themember 6 and within the drum D through a central opening 43 provided inthe head 8. The inserted end portion of the shaft 42 is provided with acrank arm 44 of desired length but provided at its free end portion witha lateral extension or pin 45 overlying the arm 23 and contactingtherewith. Upon requisite rocking movement being imparted to the shaft42 the grinding element or disc 21 may be projected or retracted withrespect to the periphery of the drum D as the requirements of practicemay desire.

The outer end portion of the shaft 42 extends beyond the outer end ofthe member 6 and fixed to said outer end portion is a rock arm 46 havingits outer end portion bifurcated. Fitting within the kerf 47 provided bysuch bifurcation is a block 48 supported for swinging movement by thepin 4S) disposed through the block 48 and the arm 46. Threaded throughthe blocl 48 is shank 50 of desired length. the outer end portion ofwhich being freely disposed through a sleeve 51 and` provided beyond thesleeve 51 with an operating wheel 52. The shank 50 is held againstlengthwise movement with respect to the sleeve 51 through the medium ofthe nuts 53 engaged with said shank adjacent the opposite ends of thesleeve 51. The sleeve 51 has a swivel connection 54, as indicated bybroken lines in Figure 2, with a spoke 55 comprised in the wheelstructure 12. By requisite turning of the shank 50 through the medium ofthe wheel 52, the arm 46 will be roc'lted as desired to effect therequisite projection or retraction of the grinding element or disc 21.

In practice, the casting to be internally ground is suitably supportedwithin a holder generally indicated at H in Figure 1, said holder beingpreferably of a character whereby the casting may be properly adjustedto effect the desired centering. The holding means H forms no particularpart of the presentinventionrandkit is believedy p that a detailedillustrationiandkdescriptionA thereof is unnecessary.

Before the casting is applied to the holder H, the head 8 isdisconnected from'fthe wall 18 and the member '6 moved outwardlyV adistance sufficient -to position said head 8 beyond the outer end of theholder H. It being also understood that the `member 14: hasl been movedoutwardly sufficient to position the 'drum D beyond the opposite end ofthe holder H, as illustrated in Figure 1. After the casting has beenapplied tothe holder H the head 8 together with the membert) may bemoved inwardly and through the bore of the'casting after whichfsaid head8 is again operatively connected with the drum D. The member 6 and drumD are shen moved in a direction to engage the drum D within the bore ofthe casting and after properly arranged therein, the wheel 52 isoperated to bring the element or disc 21 into proper contact with thewall of the bore of the casting. Y The shaft 28 is then rotatedthrough'the instrumentality of the shaft 39 to effect the desiredoperation of the element or disc 21. By imposing proper stress or strainupon the member 6 preferably through the medium ofthe wheel 12, theelement or disc 21 may be caused to operate upon the wall of the boreyof the l casting at any point therealong and by rotating the member 6,also through the medium of the wheel 12, the element or disc 21 may bebrought into contact with the wall of thebore of the casting at anypoint therearound. It is also to be particularly noted that the desiredadjustment of the element or disc 21 through the medium of the shaft 42may be effected during the periodvsaid element or disc is in rotation.

From the foregoing description it is thought to be obvious that agrinding apparatus constructed in accordance with my invention isparticularly well 4adapted for use by reason of the convenience andfacility with which it may be assembled and operated, and it will alsobeobvious that my invention is susceptible of some change and modificationwithout departing from the principles and spirit thereof and for thisreason I do not wish to be understood as limiting myself to the precisearrangement and formation of the several parts herein shown in carryingout my invention in practice except as hereinafter claimed.

1. An apparatus of the class described comprising a drum, provided withheads. one of said heads being removable, said drum being provided inits peripheral Awall f with an opening, tubular members supported forendwise movement, and rotatable movement, means for securing each ofsald members and a head of the drum, a grinding and supported" formovement with respect tothe peripheral wall of the .drum,'meansextending through one of the tubular members' for regulatingsuchmovementlof'the grinding element with respect to the peripheral wall ofthe drum, andmeans disposed' through thesecond tubular member andcoacting with the grinding element for rotating the same.

2. An apparatus of the class described comprising a drum provided withan opening inV a wall thereof, tubular members engaged with theoppositeends of the drum,

means coacting with said members for sup-V porting the same for bothrotary movement and endwse movement, a grinding element within thel drumand adapted to project through the opening in the wall of the drum,means extending through one of the tubular members and operativelyengaged with 'the grinding element for rotating the same, means engagedwith'the second tubular member for manually rotating the drum, and meansextending through the second tubular member and coacting with thegrinding element to effect a projection or retraction thereof withrespect to the peripheral wall of the drum.

3. An apparatus of thev class described comprising a drumV provided withan opening in a wall thereof, an arm mounted within the drum forswinging movement, a grinding disc rotatably supported by the arm andadapted to project through theopening in the drum, a tubular memberconnected to the drum, a rod disposed through said tubular member andextending Within the drum, the inserted end portion of the rod having arock arm coacting with the swinging arm carrying the grinding disc toimpart swinging movement to said first named arm, and means for rotatingthe rod.

4. An apparatus of the class described comprising a drum provided withan opening in a wall thereof, ank arm mounted withyin the drum 'forswinging movement, a grinding disc rotatably supported by the arm andadapted to project through the opening in the drum, a tubular memberconnected to the drum, a rod disposed through said tubular member andextending within the drum, the inserted 'end portion of the rod having arock arm coacting with the swingthe drum, a rod disposed through saidtuhu'- of the od, alud means ooae'ting with said lar memherV andextending Within the drum, rook arm to lmpait rocking movement to theinserted end portion of thefi'od having the rod. 10.

a rook arm coasting with the Swinging arm In testimony whereof Ihereunto my l carrying the giinding dise to impart swlngsignature.

mg movement to saidrfii'st named arm, a v rook arm Carried by the outerend portiozi ELMER E. THOMAS.

